#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

inline ll pow10(ll a) {
  ll res = 1;
  while (a--) res *= 10;
  return res;
}

int main() {
  cin.tie(nullptr)->sync_with_stdio(false);
  string s;
  cin >> s;
  if (s.find('.') == string::npos) {
    cout << s << "/1" << '\n';
    return 0;
  }
  int pos = s.find('.');
  string a = s.substr(0, pos);
  string b = s.substr(pos + 1);
  ll x = stoll(a) * pow10(b.size()) + stoll(b);
  ll y = pow10(b.size());
  ll g = gcd(x, y);
  x /= g, y /= g;
  cout << x << '/' << y << '\n';
  return 0;
}